If you have a gap during the ceiling, keep a straightedge throughout it, measure for the framing and Slash spacers to that thickness. Screw a spacer to the joist or truss to produce a flush surface for The brand new drywall. Reply Angela Senisi April 1, 2013 at nine:44 pm http://ricardoxeeaw.post-blogs.com/13512471/a-secret-weapon-for-how-to-remove-popcorn-ceiling-with-asbestos